Lung stress mapping: An innovative technology to visualize the hidden risk of ventilator-induced lung injury.

Summary

This study introduces and validates lung stress mapping, which reconstructs regional inspiratory transpulmonary stress by integrating esophageal/airway pressures with CT-derived pleural gradients. In animals, mapping aligned with sensor measurements and regional inflammation; in 20 ARDS patients, higher mapped stress predicted 90-day mortality despite similar global ventilatory settings.

Key Findings

• Mapping-derived regional lung stress closely matched pleural sensor measurements in pigs.
• In rabbits, higher mapped stress localized to nondependent regions and correlated with regional proinflammatory cytokines.
• In 20 ARDS patients, non-survivors had higher maximum/mean mapped stress despite similar global ventilatory parameters; mapping outperformed driving pressure for 90-day mortality association.

Clinical Implications

Lung stress mapping may enable individualized ventilation by identifying patients at high regional stress despite acceptable global settings, informing PEEP/tidal volume adjustments and adjunct strategies.

Limitations

• Small single-cohort clinical sample (n=20) limits generalizability.
• Method requires CT-based modeling and esophageal manometry, which may limit bedside adoption.

Future Directions

Multicenter validation and interventional trials using stress mapping to guide ventilation are needed; development of simplified bedside implementations (e.g., integrating with EIT) could facilitate adoption.